/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Package timewheel -
package timewheel

import (
	"errors"
	"time"
)

var (
	// ErrTaskAlreadyExist is the error of task already exist
	ErrTaskAlreadyExist = errors.New("task already exist")
	// ErrInvalidTaskInterval is the error of invalid interval for TimeWheel task
	ErrInvalidTaskInterval = errors.New("interval of task is invalid")
)

// TimeWheel can trigger tasks periodically by given intervals
type TimeWheel interface {
	Wait() []string
	AddTask(taskID string, interval time.Duration, times int) (<-chan struct{}, error)
	DelTask(taskID string) error
	Stop()
}
